mfc, Forced to build UNICODE binary?

microsoft.public.vc.mfc - Microsoft Visual C


mfc >> Forced to build UNICODE binary?

by KidLogik » Thu, 04 Dec 2003 09:51:07 GMT

Hello!

I am using the DirectShow api. I am curious as to if I must build
this application to support unicode. There is a method that I must
call ->

IGraphBuilder::RenderFile(LPCWSTR,LPCWSTR);

which takes 2 unicode strings etc.

My question is, since this method does not take any TCHARs, am I
forced to #define __UNICODE? I seem to be able to build the
application without unicode by using the L() marco ->

player.LoadFile(L"C:\\somefile.avi");

But this only works when using a literal. I would like to just pass a
CString instead. This leads me to believe that I do not need to build
a unicode application just to support that one method. Am I wrong
here? I am very confused.

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mfc >> Forced to build UNICODE binary?

by Andrew Fedoniouk » Thu, 04 Dec 2003 10:22:10 GMT


Hi,

Don't need to declare UNICODE in this case, as you can use:

void some_function(LPCTSTR lpsz1, LPCTSTR lpsz2 )
{
USES_CONVERSION;
IGraphBuilder::RenderFile(T2W(lpsz1),T2W(lpsz2));
}

See MSDN : "String Conversion Macros"

Andrew Fedoniouk.
http://TerraInformatica.com










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mfc >> Forced to build UNICODE binary?

by CheckAbdoul » Thu, 04 Dec 2003 10:26:25 GMT

You can convert your ansi string to a unicode string using the A2W macro
and pass it to the function. Something like

SomeFunc()
{
USES_CONVERSION; // do a #include "afxpriv2.h"

CString sFile( TEXT("SomeFile.txt") );
CString sPlayList( TEXT("SomeList.xyz") );

LPCWSTR sFile_U= A2W( sFile.GetBuffer(MAX_PATH+1) );
LPCWSTR sPlayList_U= A2W( sPlayList.GetBuffer(MAX_PATH+1) );

sFile.ReleaseBuffer(0);
sPlayList.ReleaseBuffer(0);

IGraphBuilder::RenderFile(sFile,sPlayList);

}

--
Cheers
Check Abdoul [VC++ MVP]
-----------------------------------






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Forced to build UNICODE binary?

by KidLogik » Thu, 04 Dec 2003 10:51:52 GMT

Awesome! Thanks Andrew :)



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Forced to build UNICODE binary?

by KidLogik » Thu, 04 Dec 2003 10:55:44 GMT

Thanks CheckAbdoul. Everything is working great now :)


On Wed, 3 Dec 2003 21:26:25 -0500, "CheckAbdoul" <checkabdoul at mvps




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